Book/Report

FZJ-2019-05087

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Untersuchungen zum Sinterverhalten von dotiertem Wolframpulver

Grüger, A. (Corresponding author)FZJ*

1999
Forschungszentrum Jülich, Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/23109

Report No.: Juel-3708

Abstract: Aim of this study was the investigation of the sintering behaviour of doped tungsten powder which is used for the production of incandescent lamp filaments. Therefore, an experimental set-up was constructed which allows direct current sintering of small tungsten bass in a special sample holder. From industrial experimental investigations it is known, that the density of the sintered bar as well as the potassium content and distribution in the sintered tungsten bar have an significant influence an the quality of the lamp filaments. In comparison to an industrial sintering scheme consisting of 3 sintering stages, sinter experiments with variations in temperature, dwell time and slope of the heating ramps were performed and the influence an microstructure and dopant release was investigated. The experimental results served as a basis for the development of a model which allow the prediction of densification, potassium release and potassium distribution for a given time-temperature schedule. A comparison of the theoretical predictions with the experimental results have shown that the simulation program is a useful tool to replace costly or hardly possible experimental investigations by the use of the theoretical results.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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